The Grant County Auditor's Office handles all election administration for Twin Brooks voters and everyone else in Grant County. Located at 210 East 5th Avenue, Milbank, SD 57252, phone (605) 432-4516, the office manages voter registration, absentee voting, polling place operations, ballot preparation, and election results certification. South Dakota offers online voter registration through the Secretary of State's website at https://sdsos.gov/elections-voting/voting/register-to-vote.aspx. Residents must be U.S. Citizens, at least 18 years old by election day, and South Dakota residents.
The registration deadline falls 15 days before any election. State law requires identification to vote; acceptable forms include a South Dakota driver's license, tribal ID, government-issued photo ID, or other identification specified in SDCL 12-18-6.1. First-time voters who registered by mail may need to provide additional identification. Registration is also available in person at the Grant County Auditor's office in Milbank, or through forms obtained at Grant County Courthouse, public libraries, or various state agencies. As an unincorporated community, Twin Brooks has no municipal government and therefore holds no mayoral or city council elections. Residents participate in Grant County, state, and federal elections but not city-level races. However, residents may be eligible to vote in local school board elections for the Milbank School District, depending on their specific location within district boundaries. Residents can find their assigned polling place by contacting the Grant County Auditor at (605) 432-4516 or using the polling place lookup tool on the South Dakota Secretary of State website at https://vip.sdsos.gov/viplogin.aspx. Polling locations are assigned based on precinct boundaries, and voters in the area typically cast ballots at a designated precinct polling place on election day. Polls are open from 7:00 AM to 7:00 PM Mountain Time or Central Time depending on the precinct location, since Grant County straddles the time zone boundary. Publicly accessible election records in South Dakota include voter registration lists (available for purchase for lawful election related purposes under SDCL 12-4-48), campaign finance reports filed with the Secretary of State or county auditors, candidate filing information, election results by precinct, and ballot measure language. Voter registration data includes name, address, date of birth, and voting history but excludes Social Security numbers and driver's license numbers. Campaign finance disclosure reports for state and county candidates are available through the South Dakota Secretary of State's Campaign Finance Portal at https://sdsos.gov/elections-voting/campaign-finance/. Precinct-level election results are published by the Grant County Auditor after each election and are available for public inspection. In the November 2024 presidential election, Grant County reported The county, like much of rural South Dakota, favored Republican candidates in federal and state races. Specific precinct data for the Twin Brooks area is available through the Grant County Auditor. South Dakota will hold elections for Governor (four-year term), all state constitutional officers, the entire South Dakota House of Representatives (70 seats, two-year terms), half of the South Dakota Senate (35 seats, four-year terms on staggered cycles), and various county offices. Grant County positions that may appear on the 2026 ballot include County Commissioner seats (five commissioners serving staggered six-year terms), County Auditor, Register of Deeds, Sheriff, State's Attorney, Treasurer, and Coroner, depending on which terms expire. South Dakota does not have a U.S. Senate seat up for election in 2026, as both senators were elected in 2020 and 2022 with six-year terms. Voters should verify specific races through the Grant County Auditor closer to the election, since candidate filing occurs in spring 2026. South Dakota voters may request absentee ballots for any election. Applications are available from the Grant County Auditor's office or can be downloaded from the Secretary of State's website. The application deadline is the day before election day, though earlier application is strongly recommended. Absentee ballots can be returned by mail (must be postmarked by election day and received within three days after the election) or delivered in person to the County Auditor's office. The state does not have permanent absentee voter status or universal mail-in voting; voters must request an absentee ballot for each election. Early in-person voting (in-person absentee voting) is available at the Grant County Auditor's office beginning 46 days before election day.